The Eibach EMS Rear Spring Kit optimizes Honda CRF450R motocross performance with a tuned spring rate. Made from high-tensile steel, this kit includes a rear spring for CRF450R dirt bikes, enhancing traction and stability. Designed for racing or trail riding, it ensures precise suspension response. Professional installation with compatible shocks is required. Powder-coated for durability, it includes a limited lifetime manufacturer warranty.